CN109356527A - A kind of login method of the submarine pipeline in Offshore Engineering work progress - Google Patents
A kind of login method of the submarine pipeline in Offshore Engineering work progress Download PDFInfo
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- CN109356527A CN109356527A CN201811525233.8A CN201811525233A CN109356527A CN 109356527 A CN109356527 A CN 109356527A CN 201811525233 A CN201811525233 A CN 201811525233A CN 109356527 A CN109356527 A CN 109356527A
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- reaming
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005553 drilling Methods 0.000 claims abstract description 54
- 238000010276 construction Methods 0.000 claims abstract description 31
- 239000011435 rock Substances 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000013459 approach Methods 0.000 abstract description 4
- 230000001427 coherent effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 10
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000916 dilatatory effect Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 244000208734 Pisonia aculeata Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000005945 translocation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/12—Underwater drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/043—Directional drilling for underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/061—Deflecting the direction of boreholes the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
A kind of login method of the submarine pipeline in Offshore Engineering work progress is returned using directional drilling crossing and technology is dragged to realize logging in for submarine pipeline；→ drill bit a little pulls out back from burying → just to be pushed away reaming → drill bit step by step and from seabed be unearthed → draws back drill bit → coating (argillic horizon and mud) and just pushing away reaming → pipe laying barge on reaming bit → and unloading drill bit its construction process are as follows: Directional Drilling rigging up and debugging → from land to marine brill pilot hole → drill through rock layer, connecting pipe → pipeline is prefabricated in pipe laying barge, start back to drag → return to drag completion, carries out coherent detection.Being returned using directional drilling crossing of the invention drags technology to carry out logging in for submarine pipeline; the difficulty of construction of conventional submarine pipeline landing approach can effectively be solved, effective protection can be carried out to existing facility and environment; greatly reduce construction operation amount; it is obviously shortened construction period, reduces the construction cost of entire engineering project.
Description
Technical field
The present invention relates to Offshore Engineering fields, especially one kind submarine pipeline in Offshore Engineering work progress
Login method.
Background technique
Submarine pipeline refers between Offshore Units and plays between Offshore Units and land terminal medium translocation
Pipeline.Submarine pipeline routine landing approach are as follows: excavated, drawn and backfilled protection, technology in advance to section submarine pipeline is logged in
Background technique situation and there are the following problems:
1, the offshore end landforms for logging in section are complicated and sea situation is more severe (wind scale height and later the wave is high), it will to logging in section
The pre- ditching operation of submarine pipeline brings very big difficulty.
2, closer from facilities such as existing submarine pipeline and cables, and need to have protection after the facilities such as submarine pipeline and cable to this and carry out removal work
Industry, to the safety for having the facilities such as submarine pipeline and cable, there are certain construction risks.
3, protection removes operation and backfill protection operation after the facilities such as the pre- ditching operation of submarine pipeline, existing submarine pipeline and cable
Big etc. total engineering workload, investment working sources are big, it will greatly increase the implementation cost of entire engineering project；And construction period
It is long, it will plan is completed in the construction for influencing subsequent entire project.
4, protection removes operation and backfill protection operation after the facilities such as the pre- ditching operation of submarine pipeline, existing submarine pipeline and cable
Etc. will destroy existing related facility and original environment etc., and it is destructive larger.
Immediate search result is as follows:
State Intellectual Property Office discloses the patent document of Publication No. CN108412424A, and a kind of Directional Drilling, which returns, drags construction
In prevent drilling rod from springing back tooling, it is characterised in that: including anchoring mechanism and lattice retaining device, the anchoring mechanism includes that steel cylinder is mixed
Solidifying soil stake, the steel cylinder concrete stake outer wall are installed with the first lifting lug, and the lattice retaining device includes sleeve and block, the sleeve
It is set in on operation drilling rod, the sleeve outer wall is installed with the second lifting lug, and the block is located at the sleeve and bores with to operation
It is described to operation drilling rod to limit between bar, it is connected between first lifting lug and the second lifting lug by wirerope.
For another example State Intellectual Property Office discloses the patent document of Publication No. CN101786496B, a kind of deep water Directional Drilling
Hole and steel-cable back-dragging device, it is characterised in that: include: shell, at least one pedestal, several columns, frame lid, Screw Anchor, storage
Mechanism and drilling machine mechanism, hydraulic mechanism, are blown down at measurement control mechanism in mud mechanism, and the drilling machine mechanism includes: to coil drilling rod, twist
Vehicle, electric slip ring, brill push and pull machine, drill bit and detector to brill angle adjuster, drilling rod, wherein coil drilling rod and coil setting in winch
On, winch is fixed on the base, and electric slip ring is arranged on winch, and hydraulic mechanism is connected with electric slip ring, coils drilling rod and dense mud
Pump is connected, and bores to brill angle adjuster and is connected with measurement control mechanism, bores and be set on the base to brill angle adjuster, drilling rod pushes and pulls machine
Be connected respectively to boring angle adjuster with coiling drilling rod and bore, drill bit is arranged outside shell, drill bit equipped with detector, detector with
Control mechanism is measured to be connected；Chu Ni mechanism is connected with pedestal, and column is fixed at the end of pedestal, and column is arranged in frame lid
Top, shell are coated between pedestal and frame lid, and Screw Anchor is attached on column, hydraulic mechanism, drilling machine mechanism, measurement control machine
Structure and blowing mechanism are all disposed on pedestal, and measurement control mechanism is connected respectively to transmit letter with drilling machine mechanism and hydraulic mechanism
Number, hydraulic mechanism is connected with Chu Ni mechanism, blowing mechanism and drilling machine mechanism respectively, and drilling machine mechanism is connected with Chu Ni mechanism.
By patent retrieval, the technology returned in terms of dragging about submarine pipeline Directional Drilling similar with the present invention is not retrieved
Content.
Summary of the invention
To be faced using conventional submarine pipeline landing approach: difficulty of construction is larger, to existing facility and environmental disruption
Greatly, construction operation amount is big and long construction period, will greatly increase the construction cost of entire engineering project.
In order to effectively solve the above problems, the present invention provides one kind in Offshore Engineering work progress submarine pipeline
Login method.
The purpose of the present invention is achieved through the following technical solutions:
A kind of login method of the submarine pipeline in Offshore Engineering work progress, it is characterised in that: use Directional Drilling
From land to marine, after passing through marine rock layer and coating, pipeline returning is carried out in the borehole, realizes submarine pipeline by sea
To logging in for land；Its construction process are as follows: installation and debugging orient drilling equipment → from land to marine brill pilot hole → drill through rock
Layer → drill bit buries a little to pull out back → use from land and is just pushing away mode reaming step by step → drill bit be unearthed → draws back drill bit from seabed → and cover
Cap rock (argillic horizon with mud) unloads drill bit using just pushing away mode reaming → reaming bit connects pipe laying barge →, and connecting pipe →
Pipeline is prefabricated in pipe laying barge, starts back to drag → return to drag to be detected after the completion.
Further, it from land to marine brill pilot hole, is oriented to hole precision and uses magnetic target positioning combination GPS Dual positioning
Technology is controlled.
Further, drill through rock layer → drill bit a little pulls out back from burying, and is segmented using lithosphere and seabed coating
Construction technology carries out reaming in two stages, first is that rock section reaming, second is that coating reaming.
Further, reaming step by step is just being pushed away, is just pushing away counter-boring techniques using major diameter power reamer.
Further, pipeline is prefabricated in pipe laying barge, starts back to be dragged to back the process for dragging completion to be by Directional Drilling and marine paving
Pipe ship cooperates dilatory pipeline to complete together.
The beneficial effects of the present invention are: the difficulty of construction of submarine pipeline landing approach is reduced, to existing facility and environment
Effective protection is carried out.Greatly reduce construction operation amount, hence it is evident that shorten construction period, reduce the construction of entire engineering project
Cost.
Detailed description of the invention
Fig. 1 is to return that technology is dragged to carry out the construction process that submarine pipeline logs in using directional drilling crossing；
Fig. 2 arranges terrestrial beacon systems；
Fig. 3 GPS drill bit tracking measurement instrument；
Fig. 4 rock section is just pushing away reaming schematic diagram；
Fig. 5 clay section is just pushing away reaming schematic diagram；
Fig. 6 Directional Drilling and marine pipe-laying ship cooperate dilatory pipeline landing schematic diagram；
Fig. 7 returns drilling tool part connected mode schematic diagram when dragging.
In figure: 1, GPS signal；2, GPS drill bit tracking measurement instrument；3, drill bit；4, seawater；5, land；6, land rig；
7, drilling rod；8, Hai Guan；9, pipe laying barge.
Specific embodiment
Referring to Fig.1, it after passing through marine rock layer and coating, is carried out in the borehole using Directional Drilling from land to marine
Pipeline returning realizes submarine pipeline by marine logging in land；Its construction process are as follows: installation and debugging orient drilling equipment → from land
Ground uses to marine brill pilot hole → drill through rock layer → drill bit buries from land and a little pulls out back → and just pushes away mode reaming → brill step by step
Head, which from seabed be unearthed → draws back drill bit → coating (argillic horizon with mud) use and just pushes away mode reaming → reaming bit, to be connected
Upper pipe laying barge → unload drill bit, connecting pipe → pipeline is prefabricated in pipe laying barge, starts back to drag → return to drag to be detected after the completion.
1, pilot hole precision controlling --- magnetic target positioning combination GPS Dual Positioning Technology
In order to ensure Directional Drilling construction carries out meeting technical requirements with precision according to design routing curve.It is oriented to hole precision control
Main technical requirements processed are as follows:
1) precise measurement unwrapping wire；
2) the magnetic azimuth measurement for passing through center line is carried out；
3) arrangement terrestrial beacon systems measure (such as Fig. 2) in ground configuration artificial magnetic field auxiliary；
4) drill bit positioning auxiliary, using GPS drill bit tracking measurement instrument subsidiary (such as Fig. 3)；
5) guarantee steering accuracy of instrument；
6) well construction, pilot hole strictly press design curve drilling；
7) it constructs in strict accordance with the requirement of job specfication, it is ensured that the operation of every drilling rod meets the curvature half of design defined
Diameter range；
8) when connection is without magnetic drill collar, deflecting pipe nipple, drill bit, it is ensured that in tool-face and the bit jet drilling of deflecting pipe nipple
Heart line is consistent, makes the tool face amount of measurement closer to actual tool face amount, facilitates steering engineer and control drilling direction；
9) direction controlling system uses high-precision mathematical model；
10) in pilot hole drilling process, when discovery pilot hole shifts, when carrying out secondary correction, using level side
Upward " c-type deflecting " bores pilot hole to unearthed point, avoids " S type deflecting " as far as possible.
2, simulated mud technology
In order to avoid drilling cuttings carries unclean, drilling rod increases drilling rod torque by viscous card, and thrust or pulling force increase, and returns and drags
The problems such as Shi Zeng great is to submarine pipeline anti-corrosion damage layer；Ensure the safe and smooth progress of crossing project.According to penetrating ground geology item
Part in mud test room trial and should determine different mud prescriptions, in the construction process, should be according to geological condition and drilling work
Skill, i.e., pilot hole stage, reaming stage and hole flushing, return drag the stage, selection adjustment mud formula and mud property, recommend mud
Slurry performance is shown in Tables 1 and 2.
1 mud ratio of dynamic shear force/yield value to plastic viscosity of table, filter loss return slurry silt carrying capacity table
2 mud viscosity table of table
3, major diameter power reamer just pushes away counter-boring techniques
Power reamer working principle is to drive cutting disc high speed rotation using the power of mud motor output, to reach
The purpose of rock cutting, and improve reaming efficiency.Due to power reamer high-speed smooth operate so that hole inner wall very
It is smooth, effectively reduce back the breakage risk of pipeline anticorrosion coating when dragging.Such as submarine pipeline outer diameter is Φ 610mm, by reaming
Diameter is greater than 1.5 times of considerations of submarine pipeline outer diameter, this reaming is reaming step by step, referring to table 3.
It is 3 pipeline reaming series of table, differential
4, lithosphere and seabed coating section construction technology
Crossing project soil layer is generally divided into lithosphere and coating (argillic horizon and mud)；When due to rock section reaming
Between it is long, the collapse hole or shrinkage cavity of the side coating that is unearthed in order to prevent carry out reaming in two stages, first is that rock section reaming, two
It is coating reaming.So it is as follows to carry out section construction process according to lithosphere and coating:
1) the side lithosphere that buries is crept into from land to sea first.After drilling lithosphere, drill bit is pulled out back, then carries out rock
Section reaming.Rock section reaming uses and just pushes away chambering process；Drilling tool installation power reamer is constructed, and is such as schemed, 4.
2) the pilot hole drilling of remaining unearthed side coating carries out again after waiting the reaming of rock section to complete.Guide digging is complete
After being unearthed at, drill bit in seabed, after combining confirmation bit location by marine magnetic target positioning system and diver, by drill bit from burying
Point is drawn back, and is changed to clay section and is just being pushed away reamer, start clay section just pushes away reaming.Clay section reamer is recommended board-like using cylinder
Reamer, such as Fig. 5.
5, Directional Drilling and marine pipe-laying ship cooperate dilatory pipeline landing technology
Submarine pipeline return drag take pipe laying barge it is prefabricated, draw back the mode dragged by land rig, pipeline precast with time drag
Intersect and carry out, i.e., prefabricated section, a time drag one section；Such as Fig. 6；Moment pay close attention to submarine pipeline return drag during directional drilling machine pull-back force
With pipe laying barge stretcher tension values, if in design requirement content, and whether numerical value change is steady, it is ensured that return and operation is dragged to connect
It is continuous, reduce the pipeline time totally stationary in hole to the greatest extent；Return drilling tool connection type when dragging: drilling machine → drilling rod → heavy weight drill pipe →
Borehole enlargement by drawing back device → rotary joint → U-loop → working line (pipe laying barge), such as Fig. 7.
After the completion of submarine pipeline time drags, the influence that hauling pipe line is constructed by submarine pipeline pipe laying barge is returned in order to prevent, is used
On the basis of holding card embraces back the tube body delayed, while holding card is connected to drilling machine by use wirerope, prevent submarine pipeline construction from making
Industry is dilatory to have installed go back to hauling pipe road in place.To undersea pipe-laying a distance, the test of drilling machine pull-back force shows go back to hauling pipe road
It is no longer influenced by the influence of submarine pipeline construction, i.e., dismountable holding card, drilling machine basis carry out the construction of land linkage section.
The above is a preferred embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, it is noted that for those skilled in the art, modify or wait to technical solution of the present invention
With replacement, without departure from the protection scope of technical solution of the present invention.
Claims (5)
1. a kind of login method of the submarine pipeline in Offshore Engineering work progress, it is characterised in that: using Directional Drilling by
Land is to marine, after passing through marine rock layer and coating, carries out pipeline returning in the borehole, realize submarine pipeline by sea to
Land logs in；Its construction process are as follows: installation and debugging orient drilling equipment → from land to marine brill pilot hole → drill through rock layer
→ drill bit buries from land and a little pulls out back →, which uses, just to push away mode reaming → drill bit from seabed be unearthed → draws back drill bit → covering step by step
Layer (argillic horizon with mud) unloads drill bit, connecting pipe → pipe using just pushing away mode reaming → reaming bit connects pipe laying barge →
Road is prefabricated in pipe laying barge, starts back to drag → return to drag to be detected after the completion.
2. the login method of Offshore Engineering submarine pipeline according to claim 1, it is characterised in that: from land to sea
Middle brill pilot hole, guiding hole precision are controlled using magnetic target positioning combination GPS Dual positioning.
3. the login method of Offshore Engineering submarine pipeline according to claim 1, it is characterised in that: drill through rock layer
→ drill bit a little pulls out back from burying, and using lithosphere and the section construction of seabed coating, i.e., carries out reaming in two stages,
First is that rock section reaming, second is that coating reaming.
4. the login method of Offshore Engineering submarine pipeline according to claim 1, it is characterised in that: just push away and expand step by step
Hole just pushes away reaming using major diameter power reamer.
5. the login method of Offshore Engineering submarine pipeline according to claim 1, it is characterised in that: pipeline is in pipe laying
Ship is prefabricated, start back to be dragged to back the process for dragging completion be from Directional Drilling together with marine pipe-laying ship with draw pipeline and complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811525233.8A CN109356527B (en) | 2018-12-13 | 2018-12-13 | Method for landing submarine pipeline in marine petroleum engineering construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811525233.8A CN109356527B (en) | 2018-12-13 | 2018-12-13 | Method for landing submarine pipeline in marine petroleum engineering construction process |
Publications (2)
| Publication Number | Publication Date |
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| CN109356527A true CN109356527A (en) | 2019-02-19 |
| CN109356527B CN109356527B (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811525233.8A Active CN109356527B (en) | 2018-12-13 | 2018-12-13 | Method for landing submarine pipeline in marine petroleum engineering construction process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734308A (en) * | 2020-07-28 | 2020-10-02 | 中国石油天然气集团有限公司 | Forward reaming method for directional drilling penetration |
| CN112814650A (en) * | 2021-01-05 | 2021-05-18 | 四川石油天然气建设工程有限责任公司 | Hole measuring process for directional drilling of wireless probe and pipe back-dragging risk assessment method |
| CN112923129A (en) * | 2021-01-21 | 2021-06-08 | 四川石油天然气建设工程有限责任公司 | Butt-joint type dragging pipe construction process and system for oil and gas pipelines |
| CN113131405A (en) * | 2021-04-20 | 2021-07-16 | 伟卓石油科技(北京)有限公司 | Cable laying system in submarine underground rock |
| CN114233191A (en) * | 2021-12-23 | 2022-03-25 | 浙江华东工程咨询有限公司 | Offshore wind farm submarine cable embankment penetrating construction method based on trenchless directional drilling technology |
| CN114754196A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气集团有限公司 | Special dragging head for submarine pipeline landing directional drill and submarine pipeline landing directional drill system |
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| CN103398217A (en) * | 2013-08-09 | 2013-11-20 | 柳州固瑞机械有限公司 | Horizontal directional driller pulling tube clamp |
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| US20120273218A1 (en) * | 2006-11-07 | 2012-11-01 | Halliburton Energy Services, Inc. | Offshore universal riser system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734308A (en) * | 2020-07-28 | 2020-10-02 | 中国石油天然气集团有限公司 | Forward reaming method for directional drilling penetration |
| CN111734308B (en) * | 2020-07-28 | 2022-07-12 | 中国石油天然气集团有限公司 | Forward hole expanding method for directional drilling penetration |
| CN112814650A (en) * | 2021-01-05 | 2021-05-18 | 四川石油天然气建设工程有限责任公司 | Hole measuring process for directional drilling of wireless probe and pipe back-dragging risk assessment method |
| CN112814650B (en) * | 2021-01-05 | 2022-07-26 | 四川石油天然气建设工程有限责任公司 | Hole measuring process for directional drilling of wireless probe and pipe back-dragging risk assessment method |
| CN114754196A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气集团有限公司 | Special dragging head for submarine pipeline landing directional drill and submarine pipeline landing directional drill system |
| CN114754196B (en) * | 2021-01-08 | 2024-04-30 | 中国石油天然气集团有限公司 | Special drag head for sea pipe landing directional drill and sea pipe landing directional drill system |
| CN112923129A (en) * | 2021-01-21 | 2021-06-08 | 四川石油天然气建设工程有限责任公司 | Butt-joint type dragging pipe construction process and system for oil and gas pipelines |
| CN113131405A (en) * | 2021-04-20 | 2021-07-16 | 伟卓石油科技(北京)有限公司 | Cable laying system in submarine underground rock |
| CN113131405B (en) * | 2021-04-20 | 2021-10-15 | 伟卓石油科技(北京)有限公司 | Cable laying system in submarine underground rock |
| CN114233191A (en) * | 2021-12-23 | 2022-03-25 | 浙江华东工程咨询有限公司 | Offshore wind farm submarine cable embankment penetrating construction method based on trenchless directional drilling technology |
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| Publication number | Publication date |
|---|---|
| CN109356527B (en) | 2021-06-25 |
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